High on the list of "recommendations" for your expedition is this excellent moisture wicking, breathable, midweight thermal bottom, made of technologically-advanced fabrics.

We offer the 'best of the best'. This thermal is the perfect weight for Arctic and Antarctica expeditions during each respective 'summer season' and is a perfect layer during periods of high output during winter months.

This top has these Special Features:

• More advanced than simple ‘wicking’, this high-tech fabric is chemically designed to take moisture away from the body and disperse it through the fabric for rapid evaporation. 
• It literally pulls moisture from the skin into and out of the fabric, keeping you warm, dry, and comfortable
• It is insulative on chilly days and is comfortably worn with other layers as needed
• The fabric's construction promotes airflow and breathability making it a great layer for endurance activities
• The fabrication also makes it very quick drying
• This material has anti-microbial properties for odor control
• Flat lock seams that offer abrasion-free wear